/* eslint-disable */

;(function(root, factory) {
  if (typeof define === 'function' && define.amd) {
    // AMD. Register as an anonymous module.
    define([], factory)
  } else if (typeof exports === 'object') {
    // Node. Does not work with strict CommonJS, but
    // only CommonJS-like environments that support module.exports,
    // like Node.
    module.exports = factory()
  } else {
    // Browser globals (root is window)
    root.download = factory()
  }
})(this, function() {
  return function download(data, strFileName, strMimeType) {
    var self = window, // this script is only for browsers anyway...
      defaultMime = 'application/octet-stream', // this default mime also triggers iframe downloads
      mimeType = strMimeType || defaultMime,
      payload = data,
      url = strFileName && !strMimeType && payload,
      anchor = document.createElement('a'),
      toString = function(a) {
        return String(a)
      },
      myBlob = self.Blob || self.MozBlob || self.WebKitBlob || toString,
      fileName = strFileName || 'download',
      blob,
      reader
    myBlob = myBlob.call ? myBlob.bind(self) : Blob

    if (String(this) === 'true') {
      //reverse arguments, allowing download.bind(true, "text/xml", "export.xml") to act as a callback
      payload = [payload, mimeType]
      mimeType = payload[0]
      payload = payload[1]
    }

    if (url && url.length < 2048) {
      // if no filename and no mime, assume a url was passed as the only argument
      if (strFileName) {
        fileName = strFileName
      } else {
        fileName = url
          .split('/')
          .pop()
          .split('?')[0]
      }
      anchor.href = url // assign href prop to temp anchor
      if (anchor.href.indexOf(url) !== -1) {
        // if the browser determines that it's a potentially valid url path:
        var ajax = new XMLHttpRequest()
        ajax.open('GET', url, true)
        ajax.responseType = 'blob'
        ajax.onload = function(e) {
          download(e.target.response, fileName, defaultMime)
        }
        setTimeout(function() {
          ajax.send()
        }, 0) // allows setting custom ajax headers using the return:
        return ajax
      } // end if valid url?
    } // end if url?

    //go ahead and download dataURLs right away
    if (/^data:([\w+-]+\/[\w+.-]+)?[,;]/.test(payload)) {
      if (payload.length > 1024 * 1024 * 1.999 && myBlob !== toString) {
        payload = dataUrlToBlob(payload)
        mimeType = payload.type || defaultMime
      } else {
        return navigator.msSaveBlob // IE10 can't do a[download], only Blobs:
          ? navigator.msSaveBlob(dataUrlToBlob(payload), fileName)
          : saver(payload) // everyone else can save dataURLs un-processed
      }
    } else {
      //not data url, is it a string with special needs?
      if (/([\x80-\xff])/.test(payload)) {
        var i = 0,
          tempUiArr = new Uint8Array(payload.length),
          mx = tempUiArr.length
        for (i; i < mx; ++i) tempUiArr[i] = payload.charCodeAt(i)
        payload = new myBlob([tempUiArr], { type: mimeType })
      }
    }
    blob = payload instanceof myBlob ? payload : new myBlob([payload], { type: mimeType })

    function dataUrlToBlob(strUrl) {
      var parts = strUrl.split(/[:;,]/),
        type = parts[1],
        indexDecoder = strUrl.indexOf('charset') > 0 ? 3 : 2,
        decoder = parts[indexDecoder] == 'base64' ? atob : decodeURIComponent,
        binData = decoder(parts.pop()),
        mx = binData.length,
        i = 0,
        uiArr = new Uint8Array(mx)

      for (i; i < mx; ++i) uiArr[i] = binData.charCodeAt(i)

      return new myBlob([uiArr], { type: type })
    }

    function saver(url, winMode) {
      if ('download' in anchor) {
        //html5 A[download]
        anchor.href = url
        anchor.setAttribute('download', fileName)
        anchor.className = 'download-js-link'
        anchor.innerHTML = 'downloading...'
        anchor.style.display = 'none'
        anchor.addEventListener('click', function(e) {
          e.stopPropagation()
          this.removeEventListener('click', arguments.callee)
        })
        document.body.appendChild(anchor)
        setTimeout(function() {
          anchor.click()
          document.body.removeChild(anchor)
          if (winMode === true) {
            setTimeout(function() {
              self.URL.revokeObjectURL(anchor.href)
            }, 250)
          }
        }, 66)
        return true
      }

      // handle non-a[download] safari as best we can:
      if (/(Version)\/(\d+)\.(\d+)(?:\.(\d+))?.*Safari\//.test(navigator.userAgent)) {
        if (/^data:/.test(url)) url = 'data:' + url.replace(/^data:([\w\/\-\+]+)/, defaultMime)
        if (!window.open(url)) {
          // popup blocked, offer direct download:
          if (
            confirm('Displaying New Document\n\nUse Save As... to download, then click back to return to this page.')
          ) {
            location.href = url
          }
        }
        return true
      }

      //do iframe dataURL download (old ch+FF):
      var f = document.createElement('iframe')
      document.body.appendChild(f)

      if (!winMode && /^data:/.test(url)) {
        // force a mime that will download:
        url = 'data:' + url.replace(/^data:([\w\/\-\+]+)/, defaultMime)
      }
      f.src = url
      setTimeout(function() {
        document.body.removeChild(f)
      }, 333)
    } //end saver

    if (navigator.msSaveBlob) {
      // IE10+ : (has Blob, but not a[download] or URL)
      return navigator.msSaveBlob(blob, fileName)
    }

    if (self.URL) {
      // simple fast and modern way using Blob and URL:
      saver(self.URL.createObjectURL(blob), true)
    } else {
      // handle non-Blob()+non-URL browsers:
      if (typeof blob === 'string' || blob.constructor === toString) {
        try {
          return saver('data:' + mimeType + ';base64,' + self.btoa(blob))
        } catch (y) {
          return saver('data:' + mimeType + ',' + encodeURIComponent(blob))
        }
      }

      // Blob but not URL support:
      reader = new FileReader()
      reader.onload = function(e) {
        saver(this.result)
      }
      reader.readAsDataURL(blob)
    }
    return true
  } /* end download() */
})
